1  // Copyright (c) 2022 The Bitcoin Core developers
 2  // Distributed under the MIT software license, see the accompanying
 3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 4  
 5  #include <node/chainstatemanager_args.h>
 6  
 7  #include <arith_uint256.h>
 8  #include <common/args.h>
 9  #include <common/system.h>
10  #include <logging.h>
11  #include <node/coins_view_args.h>
12  #include <node/database_args.h>
13  #include <tinyformat.h>
14  #include <uint256.h>
15  #include <util/result.h>
16  #include <util/strencodings.h>
17  #include <util/translation.h>
18  #include <validation.h>
19  
20  #include <algorithm>
21  #include <chrono>
22  #include <string>
23  
24  namespace node {
25  util::Result<void> ApplyArgsManOptions(const ArgsManager& args, ChainstateManager::Options& opts)
26  {
27      if (auto value{args.GetBoolArg("-checkblockindex")}) opts.check_block_index = *value;
28  
29      if (auto value{args.GetBoolArg("-checkpoints")}) opts.checkpoints_enabled = *value;
30  
31      if (auto value{args.GetArg("-minimumchainwork")}) {
32          if (!IsHexNumber(*value)) {
33              return util::Error{strprintf(Untranslated("Invalid non-hex (%s) minimum chain work value specified"), *value)};
34          }
35          opts.minimum_chain_work = UintToArith256(uint256S(*value));
36      }
37  
38      if (auto value{args.GetArg("-assumevalid")}) opts.assumed_valid_block = uint256S(*value);
39  
40      if (auto value{args.GetIntArg("-maxtipage")}) opts.max_tip_age = std::chrono::seconds{*value};
41  
42      ReadDatabaseArgs(args, opts.block_tree_db);
43      ReadDatabaseArgs(args, opts.coins_db);
44      ReadCoinsViewArgs(args, opts.coins_view);
45  
46      int script_threads = args.GetIntArg("-par", DEFAULT_SCRIPTCHECK_THREADS);
47      if (script_threads <= 0) {
48          // -par=0 means autodetect (number of cores - 1 script threads)
49          // -par=-n means "leave n cores free" (number of cores - n - 1 script threads)
50          script_threads += GetNumCores();
51      }
52      // Subtract 1 because the main thread counts towards the par threads.
53      opts.worker_threads_num = std::clamp(script_threads - 1, 0, MAX_SCRIPTCHECK_THREADS);
54      LogPrintf("Script verification uses %d additional threads\n", opts.worker_threads_num);
55  
56      return {};
57  }
58  } // namespace node